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DevOps & Cloud Infrastructure (138)AI & LLMs (102)Web Development (81)ERP Systems (72)Backend & APIs (60)Software Development (52)Security (28)Career Reflections (27)Cloud (15)Product & SaaS (12)AI / Machine Learning (5)University (1)Hackathons (1)

Building a POS + Mobile ERP for an Indonesian Carwash SME

Product

July 20269 min read

Building a POS + Mobile ERP for an Indonesian Carwash SME

How I shipped a three-surface ERP — NestJS API, Next.js POS, Flutter field app — for a cash-heavy, multi-branch carwash that loses wifi in the bays.

Why My ERP Cash Book Is a Derived Postgres UNION View

Backend

July 20269 min read

Why My ERP Cash Book Is a Derived Postgres UNION View

How I killed a drift-prone ledger table and rebuilt the JID Carwash cash book as a derived Postgres UNION view over payments, expenses, and kasbon.

Flutter Offline-First Outbox Sync for a Field App

Software Development

July 20269 min read

Flutter Offline-First Outbox Sync for a Field App

How the JID Carwash Flutter field app keeps taking orders in no-signal bays using a local outbox, connectivity_plus, and idempotent replay to a NestJS API.

Why We Store Money as Integer Rupiah, Never Float

Backend

July 20269 min read

Why We Store Money as Integer Rupiah, Never Float

Why the JID Carwash ERP stores every rupiah as an integer, never a float — and the end-of-day reconciliation bug that made the rule non-negotiable.

Modeling Kasbon: Employee Cash Advance in an ERP

ERP

July 20269 min read

Modeling Kasbon: Employee Cash Advance in an ERP

How I built the kasbon flow end to end in a real carwash ERP — request, cash-session disbursement, piutang tracking, and automatic payroll deduction.

One Contract, Two Backends: Offline Parity for Web and Mobile

Software Development

July 20269 min read

One Contract, Two Backends: Offline Parity for Web and Mobile

How a single typed repository contract with Api and Mock adapters gave our Next.js POS and Flutter carwash app full offline and demo parity.

Showing 271–276 of 594 posts

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